Tuesday, July 8, 2014
Fall webworm colonies becoming obvious
Many folks believe that they need to penetrate the web with an insecticidal spray to control this pest. Since the caterpillars are continuously expanding their web in a quest for more green leaves, applying an insecticide on the foliage surrounding the web will effectively control this pest.
In commercial pecan groves, there should be more than 5 colonies per acre to justify an orchard wide insecticide treatment. This spring, I have seen very few webworm colonies in pecan groves that were sprayed for pecan nut casebearer. It seems that the residual action of the earlier applied insecticide treatment has kept early-hatch webworms in check.